INDEX. 



661 



Asymmetron, 504 

 Atalapha, 638 

 Atax, 454 

 Ateles, 651 

 Atelodus, 641 

 Atheca, 595 

 Atlantidse, 380 

 Adas, 581, 590 

 Atoke, 310 

 Atoll, 258 

 AtoUa, 250 



Atrium, III, 506, 508 

 Atrypa, 328 

 Attus, 453 

 Atypus, 453 

 Auclienia, 643 

 Auditory meatus, 545 

 Auditory nerve, 536 

 7\uditory organs, 127 

 Auk, 615 

 Aulacantha, 196 

 Aulophorus, 315 

 Aulospha^ra, 196 

 Aurelia, 245, 250 

 Auricle, iii, 548 

 Auricularia, 332 

 Aurochs, 642 

 Australian region, 176 

 Autoflagellata, 200 

 Autoinfection, 215 

 Autolytus, 313, 314 

 Aves, 603 

 Avicularia, 323 

 Aviculidse, 367 

 Aye-Aye, 649 

 Axial skeleton, 526 

 Axiothea, 313 

 Axis, 590 

 Axis cylinder, 96 

 Axolotl, 587 

 Axons, 94 

 Azoic era, 180 

 Azygobranchia, 379 



Baboons, 651 

 von Baer, 17 

 Bsetisca, 479 

 Badger, 647 



Balcena, 646 



Balsenoptera, 646 



Balancers, 491 



Balaninus, 485 



Balanoglossus, 513 



Balantidium, 209, 210 



Balanus, 423 



Baleen, 645 



Bandicoot, 633 



Barbs 603 



Barbules, 603 



Barnacles, 423 



Basalia, 330, 340, 527 



Bascanion, 601 



Basioccipital bone, 522 



Basiopodite, 410 



Basisplienoid bone, 522 



Bass, black, 577 



Bassomatophora, 383 



Bath sponges, 227 



Bats, 637 



Bdellodrilus, 315 



Bdellostoma, 557 



Bdelloura, 271 



Bears, 647 



Beaver, 639 



Bedbug, 489 



Bee, larva of, 105 



Bees, 487 



Beetles, 483 



Bela, 380 



Belemnites, 388 



Bellovacensis, 9 



Bell's lavs', 536 



Belosepia, 388 



Belostoma, 489 



Belostomidte, 489 



Beroe, 264 



Beroidae, 264 



Bestiarius, 9 



Bicidium, 259 



Bicoseca, 201 



Bicuspid teeth, 626 



Big horn, 642 



Bilateral symmetry, 131 



Bilharzia, 277 



Bimana, 650 



Biogenesis, fundamental lavt' of, 34 



